Re: [Qemu-devel] kvm: virtio-net: saved image requires TUN_F_UFO support

[Paolo Bonzini <pbonzini@redhat.com>]

On 11/11/2017 19:59, Stefan Priebe - Profihost AG wrote:
> Hello,
> 
> Am 10.11.2017 um 05:18 schrieb Jason Wang:
>>
>>
>> On 2017年11月08日 19:22, Jason Wang wrote:
>>>
>>>
>>> On 2017年11月08日 18:46, Paolo Bonzini wrote:
>>>> On 08/11/2017 09:21, Jason Wang wrote:
>>>>>
>>>>> On 2017年11月08日 17:05, Stefan Priebe - Profihost AG wrote:
>>>>>> Am 08.11.2017 um 08:54 schrieb Jason Wang:
>>>>>>> On 2017年11月08日 15:41, Stefan Priebe - Profihost AG wrote:
>>>>>>>> Hi Paolo,
>>>>>>>>
>>>>>>>> Am 06.11.2017 um 12:27 schrieb Paolo Bonzini:
>>>>>>>>> On 06/11/2017 12:09, Stefan Priebe - Profihost AG wrote:
>>>>>>>>>> HI Paolo,
>>>>>>>>>>
>>>>>>>>>> could this patchset be related?
>>>>>>>>> Uh oh, yes it should.  Jason, any ways to fix it?  I suppose we
>>>>>>>>> need to
>>>>>>>>> disable UFO in the newest machine types, but do we also have to do
>>>>>>>>> (software) UFO in vhost-net and QEMU for migration compatibility?
>>>>>>>> Any news on this?
>>>>>>>>
>>>>>>>> Greets,
>>>>>>> Since we probe UFO support, it will be disabled automatically on
>>>>>>> device
>>>>>>> startup.
>>>>>>>
>>>>>>> For the issue of migration, I think the only way is trying to fix
>>>>>>> it in
>>>>>>> kernel.
>>>>>> But 4.14 is around the corner and the patchset is already included.
>>>>>> Shouldn't this get fixed before 4.14 is released?
>>>>> We will try to seek a solution as soon as possible. If we can't catch
>>>>> 4.14, we will do it for stable for sure.
>>>> Jason, can you write to netdev and Cc Linus and me?
>>>
>>> Paolo, see this https://www.spinics.net/lists/netdev/msg465454.html
>>>
>>> Just notice this today since I'm not on the cc list.
>>
>> An update:
>>
>> After some discussions on netdev, we will try to bring UFO back
>> partially for just TAP. Willem promise to fix this. 4.14 is too late
>> consider the fix is not trivial, it will go through stable tree.
> 
> OK is it save to just revert the UFO patchset for my local branch?

Yes, it is.

Paolo